Comparer des méthodes

	Diagramme d'Ellingham	Modèle du noyau shrinking	Basicité des scories
Domaine	Génie minier	Génie minier	Génie minier
Famille	Process / pipeline	Process / pipeline	Process / pipeline
Année d'origine	1944	1976	1950
Auteur d'origine	Harold Jeffrey Torreyson Ellingham	Szekely, Evans, and Sohn	Pyrometallurgical Practice
Type	Gibbs free energy diagram for high-temperature reactions	Reaction kinetics model for solid-fluid reactions	Slag composition parameter for controlling roast/smelt conditions
Source fondatrice	Ellingham, H. J. T. (1944). Reducibility of oxides and sulfides. Journal of the Society of Chemical Industry, 63(5), 125-160.	Szekely, J., Evans, J. W., & Sohn, H. Y. (1976). Gas-solid reactions. Academic Press, New York.	Barnes, J. F., Edwards, C. C., & Sims, R. L. (2010). Copper smelting and refining: pyrometallurgical fundamentals. JOM, 52(12), 38-43.
Alias	Gibbs Free Energy Diagram, High-Temperature Reduction Diagram	Shrinking Unreacted Core Model, SCM, Leaching Kinetics Model	Basicity Index, Slag Chemistry Parameter
Apparentées	3	3	3
Résumé	The Ellingham Diagram, introduced by Harold Ellingham in 1944, is a graphical representation of the Gibbs free energy change for oxide formation and reduction as a function of temperature. It is an essential tool for predicting the thermodynamic feasibility of ore reduction and selecting appropriate reducing agents and temperatures for smelting and roasting operations.	The Shrinking Core Model, formalized by Szekely, Evans, and Sohn in 1976, describes the kinetics of chemical reactions between solid ore particles and surrounding fluids (leaching solutions, roasting gases). As the reaction proceeds from the particle surface inward, an unreacted core shrinks while products accumulate in a product layer. The model enables prediction of leaching times and optimization of hydrometallurgical processes.	Slag basicity is a measure of the composition of slag formed during smelting and roasting operations. It is typically expressed as the ratio of basic oxides (CaO, MgO) to acidic oxides (SiO2). Basicity controls slag fluidity, viscosity, and reactivity, directly affecting metal recovery, processing temperature, and product quality. It is a critical parameter in copper, nickel, and lead smelting.